Two weeks pass and Utterson meets Jekyll at a dinner party. Utterson discusses his concerns about the will with him. Jekyll laughs at Utterson's worries, comparing them to Lanyon’s "hidebound" (conventional and unadventurous) attitude to medical science.
The reader now sees why Lanyon and Jekyll have fallen out, and the reader starts to understand that Jekyll's behaviour has become unusual. Jekyll asks Utterson to talk no more about it as he has the situation under control and he can be rid of Mr Hyde whenever he chooses.